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mars1129 [50]
2 years ago
14

Pleaseee helppp with thisss asappp

Mathematics
1 answer:
Hoochie [10]2 years ago
8 0

We are given with a equation of Circle and we need to find it's radius and it's equation in standard form . But , let's recall , the standard equation of a circle is {\bf (x-h)^{2}+(y-k)^{2}=r^{2}} where <em>(h,k)</em> is the centre of the circle and radius is <em>r</em> . Proceeding further ;

{:\implies \quad \sf x^{2}+12y+22x+y^{2}-167=0}

Collecting <em>x</em> terms , y terms and transposing the constant to RHS ;

{:\implies \quad \sf (x^{2}+22x)+(y^{2}+12y)=167}

Now , as in standard equation their is a whole square , so we need to develop a whole square in LHS , for which we will use completing the square method , as coefficient of x² and y² is 1 , so adding 121 and 36 to LHS and RHS .

{:\implies \quad \sf (x^{2}+22x+121)+(y^{2}+12y+36)=167+121+36}

{:\implies \quad \sf (x+11)^{2}+(y+6)^{2}=324\quad \qquad \{\because a^{2}+2ab+b^{2}=(a+b)^{2}\}}

{:\implies \quad \bf \therefore \quad \underline{\underline{\{x-(-11)\}^{2}+\{y-(-6)\}^{2}=(18)^{2}}}}

On comparing this with the standard equation , we got our centre at <em>(-11,-6)</em> and radius is <em>18 units </em>

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A GP has 8 terms, it's first and last terms are 0.3 and 38.4/, calculate the common ratio
gladu [14]

Answer: The right  answer is 2

Step-by-step explanation:

  1. Write out the expression

T1; a = 0.3 ------------ (I)

T8; ar^7 = 38.4 ------------ (ii)

Substituting for 'a' in the second equation, we have;

0.3r^7 = 38.4

0.3r^7 = 38.4

Divide both sides by 0.3

r^7 = 38.4/0.3

r^7 = 128

r = (128)^1/7

r = 2

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3 years ago
What's the answer? I need help!
Juli2301 [7.4K]

Answer:

<h2><u>I can do algebra forever</u></h2>

First we can use distributive property. 2a-10 = 6. So we add 10 on both sides and get 2a=16. Then we divide both sides by 2 so we get a = 8. Therefore proved algebraically that a = 8. I can always do algebra. Feel free to keep asking questions like these. Well feel free to ask any question because this is brainly.

<h2><u>Answer is a = 8, 8 is answer</u></h2><h2><u></u></h2>

<u>brainliest</u>

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3 years ago
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Step-by-step explanation:

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Please answer this question !! Will give brainliest to the best answer and 30 points !!
sergey [27]

Hi,

Get knowledge *throw math book at brain*

8 x 8 x 8 is 512 so its not a or b, add that to 6 times 6 and it equals d 546,

Answered by Britton have a nice day:)

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